Features: 1Switch Status Synchronization: Support the matched switch to achieve dual control function. Two types of operation can be set, switching switch status and status synchronization. After setting the status synchronization, the two on/off positions are fixed and synchronized with other switches. 2Installation Method: The on off device supports multiple installation methods. Its bracket can be clamped onto the guide rail or fixed with screws inside the wall cassette to ensure a secure installation of the circuit breaker. 3Power On Status Can Be Set: According to your life style habits and needs, set the device's switch or maintain the original switch state after an incoming call, so that your home device can operate normally. 4Multi Control Association: Don't worry about rewiring, you can achieve dual control or even multiple controls on one light after setting up the app. 5Shared Device: Share intelligent controls with your family and work together to create your smart home, providing you great using experience. Specification: Item Type: WiFiRelaySwitchModuleProduct Material: PCProdWeight: Approx. 60g / 2.1ozWorking Temperature: -10~65CCurrent: 10AProtection Level: IP20Product Size: Approx. 40x40mm / 1.6x1.6in Package List: 1 x Switch1 x Bracket1 x User Manual